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Questions and Answers
What is the primary method of infection in this life cycle?
What is the primary method of infection in this life cycle?
- Contact with contaminated surfaces
- Inhalation of Embryonated Eggs
- Direct skin absorption of Larvae
- Ingestion of Embryonated Eggs (correct)
How many eggs can female worms shed per day?
How many eggs can female worms shed per day?
- 100 to 1,000 eggs
- 3,000 to 20,000 eggs (correct)
- 1,000 to 10,000 eggs
- 500 to 5,000 eggs
How long does it take for female worms to begin oviposition after infection?
How long does it take for female worms to begin oviposition after infection?
- 30 to 50 days
- 80 to 90 days
- 10 to 20 days
- 60 to 70 days (correct)
In which part of the digestive system do the adult worms primarily reside?
In which part of the digestive system do the adult worms primarily reside?
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What is the lifespan of the adult worms in this life cycle?
What is the lifespan of the adult worms in this life cycle?
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Study Notes
Life Cycle of Parasitic Worms
- Unembryonated eggs are excreted in feces.
- Only embryonated eggs are capable of causing infection, requiring a maturation period of 15 to 30 days.
- Transmission occurs through the ingestion of embryonated eggs, commonly due to food contamination.
- Upon entering the small intestine, eggs hatch and release larvae.
- Larvae mature into adult worms, which colonize the cecum and ascending colon.
- Adult worms reside primarily in the cecum and ascending colon.
- Female adult worms begin oviposition approximately 60 to 70 days post-infection.
- Each female can lay between 3,000 and 20,000 eggs daily.
- The average lifespan of adult worms is around one year.
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